State Route 128 (SR 128) is a Washington state highway located in

Asotin Asotin is the county seat of the county of the same name, in the state of Washington, United States. The population of the city was 1,251 at the 2010 census. It is part of the Lewiston, ID-WA Metropolitan Statistical Area. History The name ...

and Whitman counties, west of the

Idaho Idaho ( ) is a state in the Pacific Northwest region of the Western United States. To the north, it shares a small portion of the Canada–United States border with the province of British Columbia. It borders the states of Montana and Wyom ...

state line. The long route runs north from (US 12) in Clarkston to cross the

Snake River The Snake River is a major river of the greater Pacific Northwest region in the United States. At long, it is the largest tributary of the Columbia River, in turn, the largest North American river that empties into the Pacific Ocean. The Snake ...

and turn east after intersecting to terminate at (SH 128) on the Idaho state line. The highway was originally created in 1964 on a Pomeroy–Clarkston route, replacing (SSH 3K), which had been established in 1937; in 1991, the route was changed to its present form.

Route description

State Route 128 (SR 128) begins at an intersection with (US 12) in Clarkston, a city in

Asotin County Asotin County () is a county in the U.S. state of Washington. As of the 2020 census, the population was 22,285. The county seat is at Asotin, and its largest city is Clarkston. The county was created out of Garfield County in 1883 and derive ...

. The road then crosses the

over the Red Wolf Crossing into Whitman County, where it crosses the Starbuck, WA– Spalding, ID route of the Great Northwest Railroad and intersects the eastern terminus of . At the SR 193 intersection, the highway turns east and continues to the

state line, where it becomes (SH-128); which continues for another before ending at north of

Lewiston, Idaho Lewiston is a city and the county seat of Nez Perce County, Idaho, United States, in the state's north central region. It is the second-largest city in the northern Idaho region, behind Coeur d'Alene, and ninth-largest in the state. Lewiston is ...

. SR 128 after the US 12 intersection was used by 5,000 motorists daily in 2007 based on

average annual daily traffic Annual average daily traffic, abbreviated AADT, is a measure used primarily in transportation planning, transportation engineering and retail location selection. Traditionally, it is the total volume of vehicle traffic of a highway or road for a y ...

(AADT) data collected by the

Washington State Department of Transportation The Washington State Department of Transportation (WSDOT or WashDOT, both ) is a governmental agency that constructs, maintains, and regulates the use of transportation infrastructure in the U.S. state of Washington (state), Washington. Establi ...

History

The first highway that would later become SR 128 was Secondary State Highway 3K (SSH 3K), which was first designated in 1937. The road ran from Pomeroy in Garfield County southeast to Peola and later northeast to Clarkston, terminating at (PSH 3), co-signed with (US 410) at both termini. During the 1964 highway renumbering, SSH 3K became SR 128, which ran ; the current route of the highway was occupied by , which was from 1969 to 1970. In 1990, the state legislature approved an extension of SR 128 across the Red Wolf Crossing (replacing a section of SR 193) and east to the

state line. The extension was in response to the state of Idaho designating Idaho State Highway 128 on the other side of the border. A year later, SR 128 was truncated from Pomeroy to Clarkston along its current route, a loss of in total. The transfer was estimated to cost the county government $250,000 for maintenance, due in part to of new pavement required near Peola.

Major intersections

References

External links

Highways of Washington State
{{State highways in Washington related to US 12

128 128 may refer to *128 (number), a natural number *AD 128, a year in the 2nd century AD *128 BC, a year in the 2nd century BC *128 (New Jersey bus) See also * List of highways numbered A ''list'' is any set of items in a row. List or lists may al ...

Transportation in Asotin County, Washington Transportation in Whitman County, Washington